DE7009007U - SCALE SCALE. - Google Patents

Description

Note:

Gustav-A.r'.üir Seuthe
Kierspe 1
'.Va β κ learned 2

Arithmetic balance

description

The innovation is a wooden beam balance. The two Weighing pans (b) are built as U-shaped channels into which you can up to 20 hollow cylindrical plastic counters with each a diameter and a height of 30 mm each. These counting bodies also serve as weights for the scales.

ο The pivot point of the balance beam (a) is at right angles to it a downward-pointing rod (d) inserted at the end the mathematical equal sign (=) is appropriate Equal sign can be exchanged -r ° rden against -gegea ein Plastic disc with the 3 characters 1.: _ Greater than - equal to less as (> * <). The rod (J.);: xt the mathematical The character swings according to: Movement of the balance bar to the right or left. it points vertically downward.

3. Between the pan (b) and the pointer described in 2 (d) there is a sheet of plywood with a rectangular cutout (e) of 5.5 by 9 cm at the height of the bowls and in the middle between the same. Behind this opening, the equals sign (=) -see appears on the scales if they are equal Drawing-. Is the weight or the amount of counting bodies If the left shell is larger, the sign "larger than (>)" appears and vice versa "smaller than (<C)" the balance forms a horizontal board (g) that simultaneously the angle of the weighing pans (b) is limited. At the top of the vertically screwed board, which serves as a bearing (f) for the balance beam, a hook is screwed, with which you can Calculating scales can hang on the school blackboard.

4. The innovation is intended to illustrate the algebraic Equations of the simplest kind are used in the 1st and 2nd school year.

Claims (1)

Dip '-oiren number fields as sets are equal to * - elements to illustrate the equations bau ·: ta, ζ. B. (4 - + ^^ h). The plus or minus sign is printed on a right-hand plastic square (50 mm by - '+ C mm) | [| j " ^ ^ici is used in the Bei = the 2 cubes in Ieη through Aaswie = I gen with the equally heavy counts = the Wiirfsl Op-I-CJ- / U Vv _1_ ._ ■ ^ χα the gutter eesets. The children sol = embody the he find the result in the right bowl. Is that: jieion weight before = the equals sign becomes visible (as in the illustration of the arithmetic balance) and the solution is correct. On the blackboard The task can be written in the usual notation under the scales. The subtraction is done the other way around. The children place plastic cards (JC mn times ^ O mm) as placeholders for the removed Zonl = bodies. Reminder cards in the scales. This means that the subtracted amount remains visible. Equations of other kinds can also be illustrated with the calculator. E.g. 5 + 4. = G + 1? + 4 = 10-3 $, ^ "12 12"?. 4 2.5 = 14-4- etc. etc. 5. The attached drawing shows the calculator scale in the Ansicrr from the front and in section. Sections 1 to 4- have already referred to it. Schu ί ζ a η s ρ r u c he Claim 1. "Calculator", characterized by rinnenfor- ige scnalen (b) for receiving equally heavy, hollow cylindrical plastic numerals and a rectangular window between the two scales, also gexennzeicnnet by the plastic disk attached to the lower end of the pointer (d). -e «*. The applicant C UM (6.69) D.ulloS.i Pal.nlaml, G »btaudiimuil« ril.ll ·